题目内容：

Let's help Millie_______( clean)the classroom

优质解答

Let's help Millie (to) clean the classroom.
help sb to do sth 帮助某人做某事,强调是帮的人做.
help sb do sth 帮助某人做某事.可以是两个人一起做,也可以是帮的人做.